"If you're a real purist live music fan then you probably want to see some kind of talent with an instrument," he says.

"On the other hand you may just want to go to a show because you've heard these songs, you love the artist and you're going to see some kind of mind-blowing light show - you're quite happy to be there, lost in the moment."

Image caption Canadian DJ Deadmau5 has been criticised for admitting "we all hit play"

At the time, Canadian star Deadmau5 responded to the row with a blog which tried to tell the truth about what happens behind the turntables up on stage. It was headlined We All Hit Play.

"I'm not going to let it go thinking that people assume there's a guy on a laptop up there producing new original tracks on the fly, because none of the top DJs in the world to my knowledge have, myself included," Deadmau5 wrote.

"Questions of authenticity have been raised," five-times DJ world champion (and one half of Duck Sauce) A-Trak said in response.

"He [Deadmau5] doesn't fully understand, or care for, what DJ'ing is at the core, but that doesn't take away from his talent."

Today A-Trak says fans' expectations have changed in a world of flashy productions and cutting-edge light shows.

"Crowds used to come see DJs for a musical journey," he says.

"Now they expect to hear specific songs, and furthermore, they want to see a show."